- the number eight.
- a group of eight.
Origin of ogdoad
1615–25; < Late Latin ogdoad- (stem of ogdoas) < Greek ogdoás, derivative of ógdoos eighth; see -ad1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a group of eight
C17: via Late Latin from Greek ogdoos eighth, from oktō eight